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I have a strange problem. In PHP 7.4 my script for generating XML for other comparison site worked well, but after upgrading PHP to 8.0 it doesn't work anymore.

In sandbox I got these errors:

Fatal error: Uncaught Error: Class "WP_Query" not found in /home/user/scripts/code.php:78
Stack trace:
#0 {main}
thrown in /home/user/scripts/code.php on line 78

and the code in line 78 looks like this (last line with WP_query):

// FETCH ALL PRODUCTS
$args = array(
    'posts_per_page' => -1,
    'post_type' => 'product'
);

if( count( $config['exclude-products'] ) ) {
    $args['post__not_in'] = $config['exclude-products'];
}

// PRODUCT LIMIT (1 product can have multiple variations)
if( isset( $_GET['limit'] ) && $_GET['limit'] ) {
    $args['posts_per_page'] = $_GET['limit'];
}

if( isset( $_GET['offset'] ) && $_GET['offset'] ) {
    $args['offset'] = $_GET['offset'];
}

$products = new WP_Query( $args );

Can somebody help me what to do as I am not a programmer.

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2
  • 2
    This isn't likely to be PHP 8 I don't think. Unless it's somehow breaking a require, but you'd get an error for that. Do you get any warnings or errors? How are you calling this file? I assume you're trying to load it directly, and not through WordPress itself? Commented Dec 20, 2022 at 14:28
  • 4
    Wait, /home/user/scripts/code.php doesn't look like a WP path, it should either include_/themes/_ or /plugins/. How is this file actually loaded? Commented Dec 20, 2022 at 15:01

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